Case for an electronic device



FIG. 1 is a top perspective view of a case for an electronic device showing a new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is an upper side view thereof;

FIG. 5 is a lower side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken line portions in all views are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a case for an electronic device, substantially as shown and described. 